Shoe sole pressing machine



Oct. l0, 1944-n M, c. SUERKEN l 2,360,083

SHOE SOLE PRESSING MACHINE Filed May 24,. 1941 3 Sheets-Sheet 1 M? j n EMBL!!! ,f /VaJcwe// @.ScLe/T/fml 29 Z 7 20 i Z1 ,7W q 35 UMJ/w( oct. 1o, 1944. M L SUERKEN 2,360,083

SHOE SOLE PRESSING MACHINE Filed may 24, 1941 s sheets-sheet 2 7 @.SLLe/r en.)

oct. 10, 1944.. M. c. SUERKEN 2,360,083

SHOE SOLE PRESSING MACHINE Y Filed May 24, 1941 5 Sheets-Sheet 5 c7222 C Saber/ien,

Patented 'Oct 10, 1944 2,360,083 SHOE SOLE PRESSING MACHINE Maxwell C; Suerken, Erie, Pa., assignor to Lamac Process Company, Erie, Pa.-

Application May 24, 1941,` Serial No. 395,088

l3 Claims.

This invention consists of an improvement over the shoe pressing machine invention of Patent` #2,004,820 presently manufactured, with refinements, by the assignee of the instant application.

Although the machine of Patent #2,004,820 has long since proven itself to be a great advance in the art, I have found, after much experiment, that the pressure means of the machine is susceptible of radical change, to speed up the shoe soling operation and generally increase the eiilciency and effectiveness of operation of the machine.

Other objects of the invention are to provide a machine which permits instantaneous application and release of pressure; to provide adjustable means, forming a part of the pressure entity, to vary the eifective starting loci of said entity before the means is placed under load; to permit complete removal of the shoe last engaging part of the pressure mechanism from the zone of the last, until interengagement of the last and shoe and mounting of the latter in the desired position in the machine, has been accomplished; and to provide a press with initial high speed movement and minimum leverage, yet developing maximum pressure with the expenditure of negligible manual effort.

Additional objects will suggest themselves to those skilled in the art, from the following description of the present preferred form of the invention taken in connection with the accompanying drawings, wherein Fig'. 1 is a detail fragmentary vertical sectional view taken through one of lthe twin compartments of a shoe sole pressing unit constructed in accordance with this invention;

Fig. 2 is a top plan view of a twin compartment unit made in accordance with thepresent invention;

Fig. 3 is a horizontal sectionalview taken on the line 3 3 of Fig. 1 looking in the direction of the arrows and showing to advantage the leverage structure of the pressure applying means, the pressure arm bracket being shown in section;

Fig. 4 is a fragmentary vertical sectional view taken on the line 4--4 of Fig. 1 looking in the direction of the arrows, showing to advantage the forward bifurcated terminal of the operating lever and its manner of connection with the pressure arm, likewise showing to advantage the manner of connecting the pressure arm links with the pressure arm bracket;

Fig. 5 is a detailed fragmentary sectional view of the pressure mechanism, illustrating the latter in neutral position prior to the application of force thereto;

Fig. 6 is a similar View of said mechanism showing the relative position of the related parts after the application of pressure to the mechanism;

Fig. 7 is a detailed fragmentary sectional view of the pressure mechanism, showing the latter moved away from the zone of contact with the last;

Fig. 8 is a diagrammatical View of the pressure applying mechanism, illustrating the position of the levers when the mechanism is in the position shown in Fig. 5, and

Fig. 9 is a similar view showing the pressure position of the levers when the mechanism is in the position shown in Fig. 6 of the drawings.

The device of my invention` may consist of a twin compartment unit, as illustrated in Fig. 2, wherein a base I0 is employed, which may be xedly secured to a stationary support if desired. Each of the compartments of the base is equipped with articulate plates II of similar design to Patent, #2,004,820. A rubber pad I2 is superimposed on each plate II adapted for the reception of a shoe I3 in which latter a last I4 is mounted in a manner well known in the art. As shown in said Patent #2,004,820, the last I4 is likewise articulate, one part thereof being formed to provide a ratchet I5 which is adapted to be engaged by a pawl I6, mounted on the other part of the last. Pressure arm brackets II, one for each Yof the compartments, issues from the upper face of the base at one end of the latter, the upper free terminal of each bracket being bifurcated, with the free terminals of the furcations being enlarged to provide bearings I8.

For the purpose of applying pressure to the last I 4 in order to urge the latter into engagement with the shoe sole, I provide a mechanism or entity I9 mounted on each of the brackets Il. Each mechanism or entity embodies a pair oi pressure arm links 20 the outer en d of each of which is pivotally engaged, through the medium of bolts 2| with the bearings I 8. The opposite ends of the links are pivotally engaged, by bolts 2 I with bearings I8 formed on the inner ends of operating lever 22 which latter also forms a part of the operating mechanism I 9. The end of each of the operating levers 22, opposite to that upon which the bearings I8 are formed, is also bifurcated, to accommodate, between the branches 22 of said lever, an intermediate portion of a pressure arm 23. `One end of said pressure arm is pivotally mounted in the channel of the pressure arm bracket VI, the opposite end of the arm being extended `beyond the operating lever 22 to provide a boss 24. A screw threaded bore is formed in said boss to accommodate a complemental adjusting screw 25, the latter being provided with a knurled head 25. The lower end of the screw 25 is formed to provide a rounded terminal 21 which is adapted to engage a corresponding recess 28, formed in the upper wall of the last I4, as illustrated to advantage in Fig. 1. An intermediate part of the pressure arm 23, in proximity to the bearing 24, is pivotally engaged by means of a pin 29 with the adjacent wall of each of the bifurcations 22 as shown to advantage in Fig. 4.

For the purpose of facilitating operation of the mechanism I9, I embody in said mechanism an operating handle 30 the inner end of which is screw threaded and engaged with corresponding threads formed in a boss 3I which projects outwardly from the upper face of each operating lever 22. The free end of the handle may be formed to provide a handhold 32.

After much experiment I have found it desirable to arrange the pivoting point of the operating lever 22 and pressure arm 23 to substantially coincide with the point where the links 20 engage the bearings I8 of the pressure arm bracket bifurcations. Even slight variance of these positions will result in a decrease of elfective pressure on the last or will prevent the mechanism from being self locking. By extending the length of the links 26, a cushioned action is obtained since collapse of the linkage is prevented and in its stead a rocking chair movement attained. Furthermore, if the links 2U are not slightly longer, theY linkage will collapse and it is then necessary to provide stops to keep the linkage in an operating position. Out of an abundance of precaution I have, in the present invention, included, as an integral part-of the pressure arm 23, lateral ns 33 which serve as abutments or stops to insure continued operation of the machine even after the parts have been subjected to appreciable wear.

In use of this device a shoe is mounted on the rubber pad I2 in the usual manner as illustrated in Fig. 1. The last I4 having been inserted in the shoe, the screw 25 is threaded through the boss 24 until its lower terminal 21 is then engaged with the wall of the recess 28 of the last. In this way, adjustment is made with facility as the screw is not under load. During adjustment of the screw the operating mechanism is permitted to remain in the neutral position as shown in Figs. 1 and 2.. After the a-djustment has been completed, pressure is applied to the last by exerting pressure on'the handle 30 inthe direction of the screw 25, swinging the operating lever 22 on its axis of movement 29 into the position illustrated in Figs. 6 and 9. During this cycle of operation the screw 25 is caused to move downwardly from the plane indicated by the upper of the dotted lines in Fig. 5 to the lower of the dotted lines as indicated in Fig. 6. Pressure on the shoe is governed by the depth to which the shoe is embedded in the rubber pad I2. By adjusting the screw 25, its nal position may be set to urge the last and shoe toward the pad a varying amount, thus varying the pressure as desired. After the process has been completed and it is desired to remove the shoe from the machine, the handle 30 is moved in a counter-direction, which actuates the operating lever 22 and pressure arm 23, causing the latter to be rotated on its axis 34 in the bracket I1. This bodily removes the screw 25 from engagement with the last I4 thereby releasing pressure on the last and permitting removal of the latter and the shoe without interference by the operating mechanism I 9.

Various changes may be made in this invention and especially in the details of construction, proportion and arrangement of parts within the scope of the appended claims.

What is claimed is:

1. Ashoe sole pressing machine comprising a shoe supporting base and a last for engagement in the shoe; pressure means carried by the base and engageable with the last for urging the latter against the shoe sole, said means including an adjustable screw engageable with the last before movement of the means is started; and a handle on said means, for moving the latter as a unit, with the adjustable screw, into pressure applied and pressure released position, and means included in the pressure means to automatically lock said pressure means when the handle reaches one extreme position, movement of the handle in the opposite direction automatically releasing the pressure means.

2.. A shoe sole pressing machine comprising a base with a shoe supporting plate, a bracket one end of which is xedly secured to the base, the free end of the bracket overhanging the latter, a last for engagement in a shoe supported on the base plate, beneath said free end of the bracket, adjustable means carried by said bracket and engageable with the last, and operating means mounted on said bracket and coacting with the adjustable means to urge the latter against the last when the operating means is moved in one direction, movement of the operating means in the opposite direction automatically releasing said adjustable means.

3. A shoe sole pressing machine comprising a shoe supporting base and a last for engagement in the shoe, a bracket one end of which is xed on the base, the free end of the bracket overhanging the latter, pressure means movably mounted on the free end of the bracket including a pivoted pressure arm, and means adjustably carried by said arm and engageable with the last, movement of the pressure means in one direction eiecting movement of the arm on its pivot and pressure of the adjustable means against the last, movement of the pressure means in the opposite direction automatically releasing the adjustable means.

MAXWELL C. SUERKEN. 

